A tool and method for handling a part within an electrical power transmission system is disclosed, the part having a flange with a hole through the flange. A first jaw and a second jaw are connected to pivot relative to one another and have respective ends that converge upon closure, for example to hold the flange between the respective ends. The first jaw may have a tooth extended at the respective end of the first jaw for fitting within the hole in the flange to hold the flange between the respective ends when the tool is in a closed position. The tool may be a hot stick adapter, or may include a hot stick made at least in part of dielectric material. An actuator may be connected to operate one or both of the first jaw and the second jaw from a user end of the hot stick.
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1. A method of handling a dielectric protector for a component of an electrical power transmission system, the dielectric protector having a flange with a hole through the flange, the method comprising:
pivotally converging respective ends of a first jaw and a second jaw relative to one another to insert a tooth, extended at the respective end of the first jaw, within the hole in the flange, and to grip and frictionally hold the flange in place with the respective ends;
positioning the dielectric protector at least partially over the component within an electrical power transmission system using a hot stick connected to operate the first jaw and the second jaw, in which, while the respective ends grip the flange in place, a terminal tip and stem of the tooth point in a lateral direction relative to a central longitudinal axis of the hot stick; and
opening the first jaw and the second jaw relative to one another with an actuator to release the dielectric protector on the component, the actuator comprising a drive rod pivotally connected to one or both of the first jaw and the second jaw, the drive rod being supported parallel to the hot stick on an external surface of the hot stick and being operable from a user end of the hot stick to open the first jaw and the second jaw;
in which the electrical power transmission system is energized, and the dielectric protector is positioned from outside to within a safe limit of approach where the component is located, by a user who is in a position outside the safe limit of approach; and
in which the actuator is configured to provide converging motion, between the first jaw and the second jaw, within a range of positions during use while the flange is between the respective ends, the range of positions including at least:
a closed position where the respective ends grip and frictionally hold the flange to prevent the flange from moving relative to the respective ends while the tooth is within the hole in the flange; and
a position where the flange is loosely held between the first jaw and the second jaw while the tooth is within the hole in the flange.
2. The method of
4. The method of
the drive rod is pivotally connected to the second jaw to pivot the second jaw on translation of the drive rod;
the first jaw is connected to a tool end of the hot stick; and
the second jaw is pivotally connected to the first jaw, such that during translation of the drive rod, the first jaw remains stationary relative to the hot stick and the second jaw pivots relative to the first jaw.
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6. The method of
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This application claims the benefit under 35 USC 119(e) of U.S. provisional application Ser. No. 61/485,498 filed May 12, 2011.
This document relates to tools and methods for handling parts.
Various tools may be used to allow a part to be positioned or manipulated indirectly. In the electrical power transmission industry, a hot stick may be used to manipulate a part. Example hot stick adapters that allow such manipulation are all-angle pliers adapters or clamp adapters.
Dielectric protectors, such as covers, may be used to insulate components of electrical power systems from animals and birds. Examples of such protectors are disclosed in US patent publication no. 2008-0123254. Some of these protectors are secured in place using simple push fasteners that fit through preexisting holes to secure the pieces of the protector to one another. The holes may be bored through corresponding flanges that extend from the protector.
A tool for handling a part within an electrical power transmission system is disclosed, the part having a flange with a hole through the flange, the tool comprising: a first jaw and a second jaw connected to pivot relative to one another and having respective ends that converge upon closure to hold the flange between the respective ends; the first jaw having a tooth extended at the respective end of the first jaw for fitting within the hole in the flange to hold the flange between the respective ends when the tool is in a closed position; a hot stick made at least in part of dielectric material; and an actuator connected to operate one or both of the first jaw and the second jaw from a user end of the hot stick.
A method of handling a part having a flange with a hole through the flange is disclosed, the method comprising: pivotally converging respective ends of a first jaw and a second jaw relative to one another to insert a tooth, extended at the respective end of the first jaw, within the hole in the flange to hold the flange between the respective ends; positioning the part within an electrical power transmission system using a hot stick connected to operate the first jaw and the second jaw; and opening the first jaw and the second jaw relative to one another with an actuator to release the part.
A tool for handling a part within an electrical power transmission system, the part having a flange with a hole through the flange is disclosed, the tool comprising: a first jaw and a second jaw connected to pivot relative to one another and having respective ends that converge upon closure to hold the flange between the respective ends; the first jaw having a tooth extended at the respective end of the first jaw for fitting within the hole in the flange to hold the flange between the respective ends when the tool is in a closed position; and in which the first jaw and the second jaw form at least part of an adapter for a hot stick.
A tool for handling a part within an electrical power transmission system is disclosed, the part having a flange, the tool comprising: a first jaw and a second jaw connected to pivot relative to one another and having respective ends that converge upon closure to grip and stabilize the flange between respective surfaces defined by the respective ends in a closed position; a hot stick made at least in part of dielectric material; and an actuator connected to operate one or both of the first jaw and the second jaw from a user end of the hot stick.
These and other aspects of the device and method are set out in the claims, which are incorporated here by reference.
Embodiments will now be described with reference to the figures, in which like reference characters denote like elements, by way of example, and in which:
Immaterial modifications may be made to the embodiments described here without departing from what is covered by the claims.
Long-distance electricity transmission is typically carried with high voltage conductors. Transmission at higher voltages reduces resistance power loss, therefore line voltage for long distance lines is stepped up after generation by passing it through transformer stations prior to feeding the power to long-distance transmission lines. Transmission lines traverse large regions and require numerous support towers. The conductors in high tension powerlines are typically uninsulated because of the cost and additional weight of insulated versus uninsulated conductors. Because clearances between adjacent energized elements, and energized and grounded elements, are generally large in transmission systems, these systems generally are not at risk for animal-caused faults or outages.
Substations transform power from transmission voltages to distribution voltages, typically ranging from 2400 volts to 37,500 volts. Distribution voltages allow for reduced system clearances. These reduced clearances between phase to ground and phase to phase increase station susceptibility to bird or animal caused outages. Electric poles, towers, and other electrical equipment including substations may provide attractive roosts for birds, particularly in treeless regions. If the wings of a bird simultaneously contact a conductor and another object such as an adjacent conductor, support tower or tree, the resulting electrical short-circuit can kill the bird and also damage the power system. The electrical short circuit can further cause electrical system damage resulting in power outages.
Further, the nesting of birds in open cavities in electrical systems increases the risk that predators will be attracted to the nests and cause a power fault or outage. Predators can be mammals such as raccoons and cats, birds such as magpies, and snakes. Predators can also cause electrical short-circuits that can cause electrical faults or outages, damage power systems, and kill the predator. Faults caused by birds and other animals often trigger sensitive relay protection schemes, resulting in substation lockouts, interrupting service to thousands or possibly tens of thousands of customers and at the same time damaging expensive substation equipment.
Thus, in the field of electrical power transmission and distribution there is a benefit to be gained by insulating electrical power systems from short circuits caused by contact by birds and other animals. The variety and number of proposed solutions for repelling birds and other animals from electrocution risks highlights the persistence and magnitude of the problems created by such undesirable intrusion. Many different types of scarecrows and other moving devices have been developed to repel birds. In addition to moving devices, various physical structures often involving spikes or other physical barriers, have been developed to discourage birds from roosting on structures. Other bird repelling concepts use electricity or magnetic fields to discourage bird intrusion. Equipment shield and cage devices have been specifically designed to block birds and other animals from accessing and short-circuiting electrical leads, such as described in U.S. Pat. Nos. 5,153,383 and 5,485,307.
The inventor's own prior patent document discloses dielectric protectors for protecting components of electrical power transmission systems, see United States patent publication no. 20080123254, as well as methods of making such protectors. Other dielectric protectors or protectors are available.
Generally, the process of retrofitting electrical equipment with dielectric protectors may be costly and may require powering down the system. Power downs for the purpose of measuring electrical equipment for protective protectors can keep a system down for a half a day or longer time periods, at great cost. Some systems are operated under the direction of a regulatory and scheduling authority that controls the system's downtime scheduling. In locations with minimal spare power transmission capacity, it can be a challenge for a system to get the downtime needed to measure its equipment. Because electrical systems are usually scheduled for maintenance downtime on a fairly short notice (typically a week for non-emergency situations), and because scheduled downtime may be cancelled by the Regulatory Authority on an extremely short notice, there is no guarantee that a component protector will be installed during a system's available downtime period. As a result, a system can experience significant delays in protecting their equipment.
Referring to
Some of these protectors 10 may be secured in place using fasteners such as push fasteners 16 (
Referring to
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In cases where a hot stick 40 is present, the actuator 42 may be operatively connected to user end 44 of the hot stick 40 as described. User end 44 is understood to be in opposed relation to the part end 74 (
Referring to
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As discussed above, the electrical power transmission system 14 may be energized. The method may further comprise one or both of positioning and opening the tool 26 at least partially within a safe Limit of Approach 22C. Thus, positioning and opening may be carried out by a user 25 who is in a position outside the safe Limit of Approach 22C. This allows protector 10 to be remotely installed. Standard limits of approach 22 are generally set by the IEEE for live electrical systems. It should be understood that the limits of approach may vary according to region. The limits of approach 22 around energized equipment generally widens as the voltage increases. In
Referring to
Although the bulk of this disclosure is directed to use on parts with a flange 18 having a hole 24 in the flange 18, it should be understood that application to other types of parts is possible. For example, the embodiment of
In the claims, the word “comprising” is used in its inclusive sense and does not exclude other elements being present. The indefinite article “a” before a claim feature does not exclude more than one of the feature being present. Each one of the individual features described here may be used in one or more embodiments and is not, by virtue only of being described here, to be construed as essential to all embodiments as defined by the claims.
Niles, Martin S., Morin, Leo, Yeats, Keith I., Merrills, Casey Douglas
Patent | Priority | Assignee | Title |
Patent | Priority | Assignee | Title |
1245924, | |||
1539302, | |||
1718398, | |||
2264391, | |||
2288776, | |||
2316428, | |||
2514063, | |||
2630730, | |||
2658784, | |||
2966817, | |||
3057233, | |||
3473837, | |||
3666311, | |||
3670390, | |||
3788691, | |||
3840969, | |||
4242930, | Apr 27 1979 | Hubbell Incorporated | Torque controlled clamp stick adapter |
4483058, | Mar 03 1983 | A. B. Chance Company | Impact hammer elbow tool |
4653309, | Jan 07 1986 | The Boeing Company | Hand tool for installing plastic fasteners |
4799005, | Apr 13 1983 | Electrical power line parameter measurement apparatus and systems, including compact, line-mounted modules | |
4808916, | Nov 14 1986 | UNDERSGROUND SYSTEMS, INC | Power supply magnetic shunt for transmission line sensor module |
4829298, | Apr 13 1983 | Electrical power line monitoring systems, including harmonic value measurements and relaying communications | |
4855671, | Apr 13 1983 | UNDERSGROUND SYSTEMS, INC | Electrical power line and substation monitoring apparatus |
4881434, | May 09 1988 | Tool for threading oversized rope through opening in an elastic strap | |
4934949, | Sep 25 1989 | The Detroit Edison Company | Self-cleaning hot line clamp |
5058414, | Sep 25 1990 | Electrical knock-out method and tool | |
5153383, | Sep 18 1991 | Gary Guard, Inc. | Electrical insulator protector |
5247725, | Sep 25 1992 | ES HOLDING COMPANY | Fixture installation device |
5387021, | Jul 09 1993 | Cable grasping tool | |
5451730, | Aug 01 1994 | Electrical safety apparatus | |
5485307, | Aug 09 1991 | Bresser Optik GmbH & Co. KG | Binoculars |
5666253, | Jul 10 1995 | Gary Guard, Inc. | Protective shield for electrical hot stick |
5742220, | Mar 15 1995 | S&C Electric Company; S & C Electric Company | Handling tool for overhead-mounted devices |
5773777, | Sep 13 1996 | S&C Electric Company | Circuit-interrepting device with handling features |
5884540, | Nov 12 1997 | Tool having replaceable jaws | |
5967575, | May 18 1998 | Device for grabbing a hook supported by an object | |
6189190, | Dec 19 1996 | Gillet Outillage | System for the remote handling of equipment particularly adapted to elastic rings |
6454330, | Dec 28 2001 | Replaceable head for an extension tool | |
6474197, | Aug 31 2001 | Hastings Fiber Glass Products, Inc. | Cutout fuse tube installation tool |
6725745, | May 28 2002 | Safety fuse tool | |
7111526, | May 09 2005 | Norcross Safety Products, L.L.C. | Clamp pin for use by electrician or electrical lineworker |
7269892, | Apr 15 2003 | Hakko Corporation | Electric part handling device |
7666024, | Feb 13 2007 | Hubbell Incorporated | Spring loaded parallel pad clamp |
7721459, | Feb 28 2008 | Cantega Technologies Inc. | Hot stick with measuring calipers |
7740296, | Jun 24 2008 | GUTTERWHIZ LLC VA ID S482332-6 | Gutter cleaning apparatus |
7834269, | Aug 31 2006 | CANTEGA TECHNOLOGIES INC | Protection of electrical power transmission systems |
7859378, | Sep 14 2006 | Ericsson Inc | Housing for inductive coupler for power line communications |
8069754, | Jun 13 2008 | Socket wrench with washer gripping arms | |
8342494, | Nov 13 2006 | POWER MEASUREMENT LTD | Aligning structure for a power line and sensor |
8398134, | Nov 06 2008 | Quasar Services | Universal carabiner holder |
8708385, | Sep 20 2011 | Canada Post Corporation | Reaching device |
20040149474, | |||
20050199100, | |||
20060176623, | |||
20070017301, | |||
20080123254, | |||
20090014208, | |||
20100139459, | |||
20110094342, | |||
20110101716, | |||
20120150197, | |||
20120151742, | |||
20120284997, | |||
20130152388, | |||
20140373688, | |||
20160203741, | |||
EP183339, | |||
JP2012013594, |
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May 24 2011 | YEATS, KEITH I | CANTEGA TECHNOLOGIES INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 028208 | /0215 | |
May 24 2011 | NILES, MARTIN S | CANTEGA TECHNOLOGIES INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 028208 | /0215 | |
May 24 2011 | MERRILLS, CASEY D | CANTEGA TECHNOLOGIES INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 028208 | /0215 | |
May 24 2011 | TINIS, ADRIAN A | CANTEGA TECHNOLOGIES INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 028208 | /0215 | |
May 14 2012 | Cantega Technologies Inc. | (assignment on the face of the patent) | / |
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